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AIRBAG SYSTEM, Diagnostic DTC:B1620/21

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DTC Code DTC Name
B1620/21 Side Airbag Sensor RH Circuit Malfunction
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DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat airbag assembly RH, rear seat airbag assembly RH and curtain shield airbag assembly RH) is composed of the airbag sensor assembly, side airbag sensor assembly RH and rear airbag sensor RH.

The side airbag sensor assembly RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbags should be deployed.

DTC B1620/21 is stored when a malfunction is detected in the side airbag sensor assembly RH.

DTC No. DTC Detection Condition Trouble Area
B1620/21

  • Side airbag sensor assembly RH malfunction

  • Airbag sensor assembly malfunction

  • Side airbag sensor assembly RH

  • Airbag sensor assembly
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

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PROCEDURE


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    CHECK SIDE AIRBAG SENSOR ASSEMBLY RH


    1. A0008KAE02

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    3. Interchange the side airbag sensor assembly RH with LH and connect the connectors.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Clear the DTCs stored in memory (Click here).

    6. Turn the power switch off.

    7. Turn the power switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs (Click here).

      Result
      Result Proceed to
      DTC B1620/21 is output. A
      DTC B1625/22 is output. B
      DTCs B1620/21 and B1625/22 are not output. C
      Tip:

      Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

    11. Return the side airbag sensor assembly RH and LH to their original positions and connect the connectors.

      Table 1. Text in Illustration
      *1 Side Airbag Sensor Assembly LH
      *2 Airbag Sensor Assembly